TBaaS年末活动

from flask import Flask, request, jsonify
import hashlib
import time

app = Flask(__name__)

class Block:
    def __init__(self, index, previous_hash, timestamp, data, hash):
        self.index = index
        self.previous_hash = previous_hash
        self.timestamp = timestamp
        self.data = data
        self.hash = hash

def calculate_hash(index, previous_hash, timestamp, data):
    value = str(index) + str(previous_hash) + str(timestamp) + str(data)
    return hashlib.sha256(value.encode('utf-8')).hexdigest()

def create_genesis_block():
    return Block(0, "0", int(time.time()), "Genesis Block", calculate_hash(0, "0", int(time.time()), "Genesis Block"))

blockchain = [create_genesis_block()]

def add_block(data):
    previous_block = blockchain[-1]
    new_index = previous_block.index + 1
    new_timestamp = int(time.time())
    new_hash = calculate_hash(new_index, previous_block.hash, new_timestamp, data)
    new_block = Block(new_index, previous_block.hash, new_timestamp, data, new_hash)
    blockchain.append(new_block)

@app.route('/register', methods=['POST'])
def register():
    data = request.json.get('data')
    add_block(data)
    return jsonify({"message": "Block added successfully!"}), 201

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000)